Php mssql_connect无法连接到服务器

我正在尝试通过debian服务器中的php连接到远程sql server数据库

<?php
// Some basic variables
$Server = "myservername";
$User = "myuser";
$Password = "mypwd";
$Database = "facts_sql";
// Connect to the database
$dbconnect = mssql_connect($Server,$User,$Password);
?>

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有什么建议吗？谢谢

您有权访问SQL Server错误日志吗？您想检查那里的状态并匹配严重性为14的状态=？这篇文章：@SQLDBA您好，谢谢您的回答。我无法访问SQL server错误日志。

PHP Warning:  mssql_connect(): message: Login failed for user ''. (severity 14) in /var/www/Information.php on line 8
PHP Warning:  mssql_connect(): General SQL Server error: Check messages from the SQL Server (severity 14) in /var/www/Information.php on line 8
PHP Warning:  mssql_connect(): Unable to connect to server: myservername:1433 in /var/www/Information.php on line 8